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• avcodec/h264_mc_template : Only prefetch motion if the list is used.

  8 juin 2018, par Michael Niedermayer

  avcodec/h264_mc_template : Only prefetch motion if the list is used.
  Fixes : index 59 out of bounds for type 'H264Ref [48]'
  
  Fixes : 8232/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5703295145345024
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/h264_mc_template.c

• List files in a folder in natural order using bash script

  15 janvier 2017, par Vince Leko

  I am trying to merge several flv files using ffmpeg. ffmpeg requires a list of files in this format :

  file '/path/to/file1'
  
  file '/path/to/file2'
  
  file '/path/to/file3'

  With some search and trials, I have came up with this one line command :

  ffmpeg -safe 0 -f concat -i <(for entry in "$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"/*.flv;do echo "file '$entry'";done) -c copy output.flv

  The script in brackets will generate a list of paths to all files in current folder in the format that is required by ffmpeg :

  for entry in "$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"/*.flv;do echo "file '$entry'";done

  However, this only list files in alphanumeric order :

  6846641-10.flv
  
  6846641-11.flv
  
  6846641-12.flv
  
  6846641-13.flv
  
  6846641-14.flv
  
  6846641-15.flv
  
  6846641-16.flv
  
  6846641-17.flv
  
  6846641-18.flv
  
  6846641-19.flv
  
  6846641-1.flv
  
  6846641-20.flv
  
  6846641-21.flv
  
  6846641-22.flv
  
  6846641-23.flv
  
  6846641-24.flv
  
  6846641-2.flv
  
  6846641-3.flv
  
  6846641-4.flv
  
  6846641-5.flv
  
  6846641-6.flv
  
  6846641-7.flv
  
  6846641-8.flv
  
  6846641-9.flv

  To merge videos correctly, I need files to be listed in natural order like this :

  Naturally ordered files

  

  As shown in the picture, files need to be sorted by the number after - from 1 to 24, with 6846641-1.flv in the first line and 6846641-24.flv in the last line. And each line in the format like this :

  file '/mnt/c/Users/Oho/Desktop/save//6846641-xx.flv'

  Would it be possible to generate a correctly formatted list for ffmpeg with bash script (and in one line if achievable) ?

  Edit :
  Thanks to Cyrus, the modified code is here and it does the job :

  #!/bin/bash
  
  for entry in "$(cd "$(dirname "$1")"; pwd)/$(basename "$1")"/*.flv
  
  do 
  
      echo "file '$entry'" >> fileOutputList.temp
  
  done
  
  sort -t "-" -n -k 2 fileOutputList.temp > fileOutputListSorted.temp
  
  ffmpeg -safe 0 -f concat -i fileOutputListSorted.temp -c copy output.flv
  
  rm fileOutputList.temp
  
  rm fileOutputListSorted.temp

• avcodec/bsf/pcm_rechunk : reorder supported codec list

  3 mars 2024, par Marton Balint

  avcodec/bsf/pcm_rechunk : reorder supported codec list
  Use lexical order.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavcodec/bsf/pcm_rechunk.c